What the difference between deadlock avoidance and deadlock prevention?

Question

I met two terms and are they the same thing or different thing?

Answer 1

You could look at it as:
Avoid: Don't share resources across processes / mulitple threads
Prevent: When accsessing shared resources, use a semaphore.

Answer 2

Wikipedia is your friend.

• http://en.wikipedia.org/wiki/Deadlock#Prevention
• http://en.wikipedia.org/wiki/Deadlock#Avoidance